you asked about
the cart that I have for over my bed (and in which my laptop sits)...I bought it at Fry's Electronics...it's a laptop cart...it makes it nice because it sits over my bed like a hospital tray, and doesn't have to sit on my legs...so I push it out of the way when I don't want to use it..
Here:
www.kaboodle.com/reviews/adjustable-laptop-cart--walnut-finish or this site on Amazon:
www.amazon.com/dp/B000NPORAG/ref=asc_df_B000NPORAG1410882?smid=ATVPDKIKX0DER&tag=dealt29369-20&linkCode=asn&creative=395093&creativeASIN=B000NPORAGLooks like you can get them at staples too...fits nicely over my bed which is 30" high...